Internal-combustion engine



Jan. 13, 1931. H. E. CURTIS 1,788,563

INTERNAL COMBUSTION ENGINE Filed May 5, 19 27 ATTORNEY Patented Jan. 13, 193l I r i l i I p UNITED STATES P'r'r HENRY E. CURTIS, 01? SAN JOSE, CALIFORNIA, ASSIGNOR F ONE-HALF TO JOHN H. BETTS, OF LONG BEAcH fiALIFoBNIA.

INTERNAL-COMBUSTION ENGINE- Application filed May 5, 19 27." Serial No. 189,084..

The present invention relates particularly 3 and spaced but a little waytherefrom is to the manifold of an internal combustion top we-11:8] This wall overlies the branch engine. 3 in substantially parrallel relation thereto It is one object of the invention to provide to form a wide shallow chamber 9. This J a manifold so constructed and arranged as chamber converges at the end adjacent the to effect the complete and thorough homoengine as at 10, dropping downwardly to genization of the combustible'mixture pass the horizontal plane. bisecting' the passage ing therethrough. 5 and provided with an opening 11 adapted It is another object of the invention to to communicate with the valve chamber of 1'... provide a manifold wherein the combustible the engine, not shown. The otherend of mixtureis passed in effective heat exchangthe chambencurves downwardly as at 12 ing relationship with exhaust from the en-' into angular coin unication, with the basin gine cylinders whereby to elfect its more 4. Above the basin 4 and in axial alignperfect vaporization. ment therewith is formed a passage 13 I it is still anothervobject of theinvention through which the combustible mixture is to provide a device of the character indiintroduced from" a carbureter not shown. cated that will be simple in form and con- .The'carbureter is mounted upon the surface struction, economical to manufacture, and 14; l

highly eflicicnt in its practical application. That portion of the Chamber. in o Whi h 2 In the drawing: the fresh mixture is introduced lies parallel Figure 1 is a plan View of a manifold emwith the plane of the openings '6, I? and 11, bodying my invention, part being broken but in order to communicate with the disaway. cha'rgeflopening 11 its outer wall is made Figure 2 is a sectional View on 2-2 o arcuate in form as shown at 15; This por- Fi 1 ;tion of the chamber bounded on the outer Figure 3 is a section on line 33 of side by'wall 15 is divided into four channels Figure 1. V I .16, 17, 18 and 19 by. means of three arcuate Figure 4c is a section on line 4-4 of Figs webs 20, 21 and22 as shown. ure 2. *lVhen-the' manifold is mounted upon an Referring now more particularly to the engine in full operation the exhaust enters drawing, I show at l a casting having'the through openings 6 and 7, passes through following characteristics. Since'the manithe passage: 5 and discharges through 2, fold is symmetrically formed, the detailed While the fresh mixture enters chamber 9' description of one-half of the structure through 18 and 12, is divided into four'inapplies equally Well to the other half. dependent streams; throughout 'the length In the present embodiment of the invenof the webs 20,21and 22, and then comtion the discharge end of the exhaust lies bines again into a" single stream flowing in a vertical position as shown at 2 and through passage 10 and opening 11 into branches upwardly nd outwardly as at 3 the valve chamber of the engine.

and 3a, thetwo branches forming a'basin 4: It is obvious, of c ourse,:that the heated for the purpose hereinafter set forth. Atgasespassing out through the exhaust pas- 5 is shown a continuation ofthe branch 3 sageswill heat the walls thereof and parts 7 and extending. horizontallly therefrom. connected to said walls; By making the The exhaust from the engine cylinders is passage 5fquite'wide in proportion to its V discharged into the passage?) through side height a large heatedfioor area is provided 5 -op'enings (i and 7. The passage '5 is prefor the chamber 9, the webs'20, 21 and 22 ferably of much greater width'than height being also heated by conduction.

, that the heating effect of the exhaust When the fresh mixture'is drawn into n may be utilized to the fullest extent' chamber 9 through passage l3, inertiacar on the upper surface of the branch ries the heavier particles down into the w} points beyond the curved portion at both ends, the bot-toms of the said channels being depressed below the general level of the bottom of the intake manifold to serve as receptacles for liquid fuel.

HENRY E. CURTIS.

generated in the flowing gaseous mixture as it travels through an arc to opening 11 would ordinarilyseparate the heavier particles of liquid still remaining therein from the remainder of the mixture and cause it to collect along the outer curved Wall 15. I obviate this difficulty by dividing the mixture up into four small streams, thereby accelerating its speed of movement and securing complete, positive and final vaporization of all the heavier particles still remaining in the mixturethroughcontact with the heated Webs. I i 7 It may now be readily seen from the foregoing disclosure that have provided a structure in Which'the exhaust and the fresh mixture are moved in opposite directions to each other and inheat exchanging relationship to each'other in such a manner that a combustible mixture passed through the manifold is discharged therefrom'in perfect condition for use.

The channels 16, 17, l8'and 19 have their floors dropped a distance below the general level of the fioor of chamber!) whereby to receive andhold all moisture that-may collect in the channels at various times, to 'deliver the same wvhen' the heat and suction is sufficient to remove it these lowered floors are indicated at 23, 24, 25-}and 26, It is also pointed out that the ribs20, 21, 22 are con tinned a distance in to the straight portion of the chamber 9 so the channels mayreceive the mixture before any centrifugal action has been developed. 7

It is to be understood, of course, V 2

While I have herein shown and described but one specific embodiment of the invention,

changes in form, construction, arrangementand operation of the several parts and features may be made withinthe scope of the appended claim. 7

I claim: v

In combination, an exhaust manifold for internal combustion engines, and an intake manifold for the same mounted upon and overlying the exhaust manifold \Vlth a common Wall therebetween, the sald intake manifold extendingleng-thwise of the ex haust manifolda distance and then curving laterally to discharge at r'ightangles' there to, the said intake manifold havinga plurality of vertical Webs formed in its curved portion to divide the same into a plurality of independent channels, terminating lat 

